action potential, the brief (about one-thousandth of a second) reversal of electric polarization of the membrane of a nerve cell (neuron) or muscle cell. In the neuron an action potential produces the nerve impulse, and in the muscle cell it produces the contraction required for all movement...
In cardiac muscle cells, on the other hand, an initial fast sodium spike provides a "primer" to provoke the rapid onset of a calcium spike, which then produces muscle contraction.Nerve Impulse
Action potential, the brief (about one-thousandth of a second) reversal of electric polarization of the membrane of a nerve cell (neuron) or muscle cell. In the neuron an action potential produces the nerve impulse, and in the muscle cell it produces the
Muscle Contraction; Overview D.B. DiCapua, in Encyclopedia of the Neurological Sciences (Second Edition), 2014 Excitation–Contraction–Relaxation Cycle The muscle action potential triggers a sequence of actions that ultimately results in the contraction and relaxation of the muscle fiber. This sequence...
. In contrast, the initial membrane depolarization which takes the membrane potential towards the threshold for action potential initiation is a localized, graded response. At the neuromuscular junction, for example (see page 256), an action potential is triggered in the post-synaptic muscle cell ...
Related to Potential, Action:Cardiac action potential The following article is fromThe Great Soviet Encyclopedia(1979). It might be outdated or ideologically biased. rapid fluctuation of membrane potential arising in response to excitation of nerve and muscle cells or fibers; an active electrical signa...
Quinidine (1--100 micrometer) exerted negative inotropic effects in papill... H Nawrath,L Eckel 被引量: 178发表: 1978年 Action potential, membrane currents and force of contraction in cat ventricular heart muscle treated with papaverine. The effects of papaverine on force of contraction, action...
High-frequency fatigue' has been studied in isolated, short toe muscle fibres of Xenopus with recordings of tension and membrane potential during the deve... H Westerblad,J Lnnergren - 《Acta Physiologica》 被引量: 270发表: 1986年 Power output by an asynchronous flight muscle from a beetle ...
Long-Term Prognostic Value of Restitution Slope in Patients with Ischemic and Dilated Cardiomyopathies Background: An action potential duration (APD) restitution curve with a steep slope $1 has been associated with increasedsusceptibility for malignant ventr... D Marc,AJ Morguet,S Christian,... ...
aAction stretching involves an active contraction (isometric or concentric) of one muscle to full inner range, requiring the antagonist to stretch fully to outer range. 行动舒展介入活跃收缩(等量或同心)一块肌肉对充分的内在范围,要求反对者充分地舒展对外面范围。 [translate] ...